Finite Group Databasebeta

D209⋊D21 #31798309

order17556
automorphism?
homologyAbelianization (H1) = C22 · Schur multiplier (H2) = C2

Aliases

unambiguous semidirect productD209⋊D21

Splittings

Fitting, socle, derived, HallC3×C7×C11×C19 ⋊ C22
HallC7×C11×C19 ⋊ C2×D3
HallC3×C11×C19 ⋊ C2×D7
HallC3×C7×C19 ⋊ C2×D11
HallC3×C7×C11 ⋊ C2×D19
HallC11×C19 ⋊ C2×D21
HallC7×C19 ⋊ D3×D11
HallC7×C11 ⋊ D3×D19
HallC3×C19 ⋊ D7×D11
HallC3×C11 ⋊ D7×D19
HallC3×C7 ⋊ D11×D19
SylowC19 ⋊ D11×D21
SylowC11 ⋊ D19×D21
SylowC7 ⋊ D33⋊D19
SylowC3 ⋊ D77⋊D19

Subgroups

subgroupG/H
center, Frattini, hypercenterC1G
commutator, Fitting, socle, cosocle, hypocenterC3×C7×C11×C19C22
LCSG ▷ C3×C7×C11×C19
UCSC1

80 conjugacy classes of subgroups.

Full subgroup data →

Presentation

transitive degreeμt(G) = 4389

Polycyclic presentation:

2^2,3,7,11,19|e^a=e^10,f^a=f^18,c^b=c^2,d^b=d^6,e^b=e^10

Conjugacy classes & character table

1137 conjugacy classes. The character table is too large to display.

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(17556, 124);